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Long Term Debt (Details Textual) (USD $) | 9 Months Ended |  | 3 Months Ended | 9 Months Ended |  |  | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2012 | Oct. 31, 2001 | Jun. 30, 2012 Revolving Credit Facility [Member] | Jun. 30, 2012 Revolving Credit Facility [Member] | Mar. 31, 2012 Revolving Credit Facility [Member] | Jun. 30, 2012 Revolving Credit Facility [Member] Maximum [Member] | Jun. 30, 2012 Revolving Credit Facility [Member] Minimum [Member] | Jun. 30, 2012 Canadian Facility [Member] | Jun. 30, 2012 Canadian Facility [Member] Maximum [Member] | Jun. 30, 2012 Canadian Facility [Member] Minimum [Member]
Long-Term Debt (Additional Textual) [Abstract] |  |  |  |  |  |  |  |  |  |
Revolving credit facility | $ 9,800,000 |  |  |  | $ 75,000,000 |  |  |  |  |
Revolving Credit Interest Rate |  |  | The interest rate for amounts outstanding under the Amended Credit Agreement for the US Revolver is a floating rate based upon the higher of the Federal Funds Rate plus 0.5%, or the bank’s prime rate. |  |  |  |  |  |  |
Margin | 0.50% |  |  |  |  | 1.75% | 0.50% |  | 1.125% | 0.375%
Outstanding letters of credit | 41,100,000 |  | 0 | 0 |  |  |  | 0 |  |
US Revolver expires |  |  |  | Dec. 31, 2016 |  |  |  |  |  |
Credit Agreement Entrance Date |  |  |  |  |  |  |  | Dec. 15, 2009 |  |
Revolving canadian credit facility |  |  |  |  |  |  |  | 20,000,000 |  |
Revolving amended canadian credit facility |  |  |  |  |  |  |  | 9,800,000 |  |
Canadian Facility expires |  |  |  |  |  |  |  | Feb. 28, 2015 |  |
Long-Term Debt (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |
Federal Funds Rate / bank's prime rate | 0.50% |  |  |  |  | 1.75% | 0.50% |  | 1.125% | 0.375%
Decrease In US Revolver | 0 |  |  |  |  |  |  |  |  |
Amount of credit facility remaining borrowing capacity | 33,900,000 |  |  |  |  |  |  |  |  |
Amended Credit Agreement is collateralized by a pledge of voting capital stock | 100.00% |  |  |  |  |  |  |  |  |
Non-domestic subsidiaries of voting capital stock | 66.00% |  |  |  |  |  |  |  |  |
Borrowings |  | 8,000,000 |  |  |  |  |  |  |  |
Reimbursement agreement requires annual redemptions |  | 400,000 |  |  |  |  |  |  |  |
Balance in the restricted sinking fund | $ 334,000 |  |  |  |  |  |  |  |  |
Interest rate | 0.60% |  |  |  |  |  |  |  |  |

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